Escapement mechanism of typographical composing machines



Dec. 2-6, 1922. 1,440,066

T. DRAKE ET AL. ESCAREMENT MECHANISM OF TYPOGRAPHICAL COMPOSING MACHINES.

FILED FEB, 2, I922.

Patented 2%, i922,

hurra stares release earner oiu ica.

TOM DRAKE am) ERIC eArrEza, or ALTRINCHAM, ENGLAND, Assrenoe T0 LIND- TYPE AND. ACHINERY LIMITED, BRITAIN.

or LONDON, ENGLAND, n COMPANY or enna'r ESCAPEMENT MECHANISM OF TYPOGRAPHICAL 'COMPOSING MACHINES.

Application filed February 2, 192.2. Serial No. 533,606.

chinery Works, Altrincham, in the county.

of Chester, England, have invented new and useful Improvements in the Escapem ent Mechanism of Typographical Composing lilachines, oi which the following is a speciiication.

This invention relates to the escapement' mechanism of typographical composing machines such as those known commercially? under the trade mark Linotype, and particularly mechanism which includes escapement levers formed in one with their respective, pallets. When levers of this kind are mounted in. the machine so as to rock each about a single pivot, their pallets enter and leave the magazine channels by arcual movement of short radius, which has been found to be less satisfactory than the movement of the pallets of the more eXpen sive construction in which such pallets are themselves pivoted to the rocking escapeinent lever. Consequently, it has been sought to secure the advantages accruing from the movement of the pallets of the lastnamed construction, from escapement levers each formed as a single entity with its pallets, by mounting each escapement lever so that it is caused to move arcually instead of pivotally. The object of the present inven-. tion is to provide improved means for scour-- ing such arcual movement of each escapement lever as a whole about an axis outside of its own marginal edges, whereby the drawings, theescapement lever 1 is formed with a curved or arcual slot 2 traversed by two stationary parallel wires or rods 3 which are common to all the escapement evers of the same bank. The positions of the wires 3 and the curvature of the slot 2 are such that the pallets a, 5 integral with the escapement lever 1, move as nearly as practicable perpendicularly to the general plane oi the magazine 6 to which the said escapement levers 1 are fitted.

The escapement levers 1 may be rocked by any of the well-known means; the devlces illustrated comprise theordinary plungers 7 which, when moved upward by the pivoted strikers 8, (only parts of which are shown) press against the heels 9 of. the levers 1 and rock or move them across upon the wires 3 antagonistically to springs 10 which bear upon the rear ends or tails 11 of the said levers and thereby release a matrix 12, all

in the usual manner. exce )tin as re ards the transverse movement of the escapement levers transverse of the wires 3. y

In the example illustrated, the slot 2 is an arcual one struck from a centre 13 which constitutes the befoiementioned. axis about which the escapement lever 1 is caused to rock, but it is to be understood that the said slot may be otherwise than arcual, and moreover that supports other than the two wires 3 may be provided; for instance, the bearing constituted by these wires may be provided by a single rod of arcual cross section or having guiding surfaces at only its longitudinal edges.

. Having described our invention, we declare that what we claim and desire to secure by Letters Patent is 1. In or for an escapement mechanism of a typographical machine, the combination of an escapement lever formed with an interior curvilinear slot, and a bearing traversing said slot and engaging the walls thereof at a plurality of points in the length of the lever, whereby the lever is caused to rock about an axis located outside of its own marginal edges.

2. In or toran escapement mechanism of a typographical machine, the combination of an escapementlever, and a bearing on which the lever is mounted to slide in a curvilinear path, the said lever being slotted to provide ion 3 ei-emcee interior guiding surfaces engaged with the hearing at a plurality of points in the length of thelever.

3. In or for an escapenient mechanism of a typographical machine, the combination With an escapement lever having its matrixengagirig pallets integral therewith and havlng an lnterior arcual slot, of stationary par- TOM DRAKE. ERIC GAYTER. 

